Your electronics probably weren't made for underwater exploration, but that doesn't mean you're out of luck. Here are a few unusual options for waterproofing your gear, plus one mind-blowing commercial option.

Tugboat bowlines, fisherman's knots, sheet bends. The best knots are named for their jobs on the ocean, but they have numerous, practical uses on land as well. Here's how to tie the versatile bowline (and more properly tie any knot).